<< >> NASA ASRS Report 1593350, October 2018

A319 flight crew reported that when flying the noise abatement departure from lga runway 13 the track appears to diverge from the TNNS6 departure.

Attributes
ACN	1593350
Time
Date	201810
Local Time Of Day	0001-0600
Place
Locale Reference	LGA.Airport
State Reference	NY
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A319
Flight Phase	Climb
Route In Use	SID TNNS6
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

We departed on runway 13 at la guardia on the TNNS6 departure. In accordance with the noise abatement guidance on page 10-7 for runway 13; we commenced our turn at 100 feet AGL using heading select. This placed us inside the RNAV course line to the first waypoint (jutes). I recall shortly after; that we were subsequently given direct tnnis.the noise abatement guidance for runway 13 seems to conflict with the ground track for this particular SID. To resolve this; I recommend either removing the noise abatement guidance to turn at 100 feet or specify the priority (noise abatement or ground track) for each SID.

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Original NASA ASRS Text

Title: A319 flight crew reported that when flying the noise abatement departure from LGA Runway 13 the track appears to diverge from the TNNS6 departure.

Narrative: We departed on Runway 13 at La Guardia on the TNNS6 departure. In accordance with the noise abatement guidance on page 10-7 for Runway 13; we commenced our turn at 100 feet AGL using HDG Select. This placed us inside the RNAV course line to the first waypoint (JUTES). I recall shortly after; that we were subsequently given direct TNNIS.The noise abatement guidance for Runway 13 seems to conflict with the ground track for this particular SID. To resolve this; I recommend either removing the noise abatement guidance to turn at 100 feet or specify the priority (noise abatement or ground track) for each SID.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.